I've built a super-simple method for sharing your new podcast. It's mobile-first, embeds nicely on TW/FB etc and makes it easy to share with your friends on Whatsapp/Telegram/etc to get the first few listeners.
Now on private beta at https://mtrn.me!
How it looks like when you place the link on Twitter/FB:
Drop me a note if you're interested to try this out!